Flutter Tutorial Beginners - GetX Other Features

GetX Other Features | Flutter Tutorial Beginners

Previous two videos were about Navigation Management and State Management, but there is also a lot of other features that GetX provides. In this video we will cover some of those other features which include bindings, storage, internationalization, changing themes, and many other.

00:00 Introduction
00:27 Transitions
01:00 Internationalization
03:39 Bindings
05:50 Validation
07:06 Storage
10:46 Theme
12:10 Conclusion

Link to the Code: https://github.com/tadaspetra/getx_examples/tree/master/other_features 

#getx #fluttergetx #binding

Flutter Tutorial Beginners - GetX Other Features

Scroll to any Item in Your Xamarin.forms CollectionView From Your ViewModel

In this post, I am going to show you how we can easily extend CollectionView to implement ScrollTo-functionality through DataBinding from a ViewModel (for both grouped and non-grouped data sources).

If you are working with collections in your app, chances are high you are going to want (or need) to scroll to a specific item at some point. CollectionView has the ScrollTo method that allows you to do so. If you are using MVVM in your app however, there is no built-in support to call this method.

My solution

My solution for this challenge consists of following parts:

  • BindableProperty in an extended CollectionView class to bind the item we want to scroll to
  • a configuration class to control the scrolling behavior
  • a base interface with the configuration and two variants derived from it (one for ungrouped items, one for grouped ones)

Let’s have a look at the ScrollConfiguration class:

public class ScrollToConfiguration { public bool Animated { get ; set ; } = true ; public ScrollToPosition ScrollToPosition { get ; set ; } = ScrollToPosition. Center ; }

These two properties are used to tell our extended CollectionView how the scrolling to the item will behave. The above default values are my preferred ones, feel free to change them in your implementation.

#xamarin #binding #collectionview #github

Scroll to any Item in Your Xamarin.forms CollectionView From Your ViewModel

Understanding Call(), Bind() & Apply() Methods in JavaScript In Simplest Way!

Hello everyone! In this article, we shall try to understand the functionalities of JavaScript methods call()bind(), and apply().

In order to make it simpler for everyone, we shall be trying to understand them with the help of a simple example. Also, I shall make sure to not use tech-heavy jargon, so that even the new learners may understand the working of these methods easily without having to wrap their head around other stuff.

Additionally, I shall not be putting the code in a text editor or GitHub link so as to encourage you guys to code along as you read. It would really help you a lot, trust me on this. So, without any further ado, let’s get started.

First of all, let’s take a look at the basic example that we are going to follow. Here, we have created an object for an employee record, in which, we’ll be storing their basic information. Additionally, we’ll be setting up a method that can increment the salary of the employee by 10000.

Note: The “this” keyword is referring to the object in which it is situated. If it was used outside of the object, it would have referred to the window object.

#binding #programming #javascript #coding

Understanding Call(), Bind() & Apply() Methods in JavaScript In Simplest Way!
Ray  Patel

Ray Patel

1623401100

How to Bind Methods or Constructors to Functional Interfaces

To bind methods or constructors to functional interfaces, we are going to use the FunctionalInterfaceFactory of Burningwave Core library. FunctionalInterfaceFactory component uses to cache all generated functional interfaces for faster access. Before we start coding, we must add the following dependency to our _pom.xm_l:

XML

1

<dependency>2
    <groupId>org.burningwave</groupId>3
    <artifactId>core</artifactId>4
    <version>8.12.6</version>5
</dependency>

Constructors Binding

Methods Binding

Void Methods Binding

Binding to Methods with Boolean Return

Conclusion

#java #method #constructor #binding #functional interface #functional interfaces #binding in java

How to Bind Methods or Constructors to Functional Interfaces

React Simple Data Binding example » grokonez

https://grokonez.com/frontend/react/react-bind-data-simple-data-binding-example

React Simple Data Binding example

In previous post, we created a simple React Hello World Application. This tutorial shows way to implement simple data binding with React.

I. Technologies

- React 16 - NodeJs 6.11.2 - NPM 3.10.10 - Yarn 1.5.1 - Babel 6.24.1

II. Practice

1. Goal

We will build a React Application that can receive click event to add/minus value to a variable, then update variable in UI immediately: react-bind-data-example-result

2. Project Structure

react-example-project-structure

3. Step by Step

3.0 Set up Environment

We need NodeJs, Yarn and Babel to compile and run this example. Please visit Set up Environment for step by step.

3.1 Set up Project folder

Create folder for BindData project, then make subfolders and subfiles like this: react-example-create-folder

3.2 Dependency

Open package.json, write these lines for project information and dependency:

{
  "name": "bind-data",
  "version": "1.0.0",
  "main": "index.js",
  "author": "JavaSampleApproach",
  "license": "MIT",
  "dependencies": {
    "babel-preset-env": "1.5.2",
    "babel-preset-react": "6.24.1"
  }
}

3.3 index.html

This is the default HTML file that appears in the browser when we invokes our application. We also use this HTML file to embed React files and reference to our javascript app.js.

More at:

https://grokonez.com/frontend/react/react-bind-data-simple-data-binding-example

React Simple Data Binding example

#react #binding

React Simple Data Binding example » grokonez

C++17 Structural Binding

Often, a function will return multiple values packed in a structure. In good old C++ you need to assign it to a struct variable and access the individual members from there. In pre-C++17, however, you need to assign the return value to a struct variable and access the individual elements (as shown below). This article aims to demonstrate how structured binding allows you to initialize multiple variables with individual elements of a structure, tuple, or array.

#cpp17 #structural #binding

C++17 Structural Binding
Maud  Rosenbaum

Maud Rosenbaum

1604075494

How to Install and Configure Minikube on Ubuntu

Introduction

This article will demonstrate how to install and configure Minikube to set up a small Kubernetes cluster. We will then examine Kubernetes in more detail to apply that knowledge to a real-world example.

minikube logoubuntu logoWhat is Minikube?

To configure and run Kubernetes, we need at least 1 Master server and 2 Workers servers. Typically, local programs such as Minikube are used for learning, training, and testing. Minikube is a tool that makes it simple to run a local Kubernetes cluster. Minikube launches a single-node Kubernetes cluster inside a virtual machine. We will be using Minikube. Be sure to install and configure it using How to Install Minikube on CentOS, Mac, and Windows. In this tutorial, we will be using Ubuntu 18.04 to demonstrate the examples running one local cluster.

What is Kubernetes?

Kubernetes is an open-source platform used for managing containerized workloads and service automation. Many businesses are moving to a container-based system to save resources, management costs, and ease of use. Kubernetes simplifies many manual processes using containers in which we can run our applications. Some of the benefits of Kubernetes include:

  • Service monitoring and load balancing.
  • Storage management.
  • Automatic container deployment.
  • Automatic container recovery and restart.
  • Automatic load distribution between containers.
  • The self-control of containers.
  • Confidential information and configuration management.

It is also important to note that Kubernetes itself is not an end-to-end Platform as a Service, but it can be a foundation on which a PaaS is developed. Because Kubernetes operates at the container level and not the hardware level, it can quickly deploy, scale, load balance, and monitor containers.

#tutorials #assigned #binding #control #coreos #create #developer #devops #docker #kubectl #linux #read

How to Install and Configure Minikube on Ubuntu
Annalise  Hyatt

Annalise Hyatt

1598947500

Binding Concept in Javascript

Javascript binding is done using the Bind() method. With the help of the bind method, we can make one common function and bind different objects, so that the function gives different results when its need. otherwise, it gives the same result or gives an error while the code is executing.

In short, when a function or method is invoked, the bind() method allows us to easily set which object will be bound by this keyword.

var info= {

name : "XYZ",
printFunc: function(){
document.write(this.name);} // XYZ
}
info.printFunc();

In the above example, there is no problem accessing the name, this keyword bind the name variable to the function. This is called as default binding.

This keyword will here point to object i.e info object.

var info = {

name : "XYZ",
printFunc: function(){
    document.write(this);// window object or undefined(strict mode).
    document.write(this.name);
  }
}
var printFunc2= info.printFunc;
printFunc2();

In the above example, we are storing a reference of info.printFunc to printFunc2 variable. After that, we are calling it without an object reference, so this will now refer to the window (global) object or undefined (in strict mode). Hence, the binding of this is lost, so no output is produced.

So basically, the Bind() method is used so that binding of this is not lost.

By using bind() method we can set the context of _this or in simple terms we can bind this _to a particular object.


How to use bind?

  1. The bind() method creates a new function, when invoked, has the this sets to the provided value. See example below:-
var car1 = {
  name : "swift",
  color: "red",
}
var car2 = {
  name : "alto",
  color: "blue",
}
function infoFunc() {
   document.write(this.name + " " + this.color + "<br/>");
 }
infoFunc.bind(car1)(); // swift red
infoFunc.bind(car2)(); // alto blue

There is one common function infoFunc() which is invoked 2times with different objects so that different results are produced. This first binds to car1 object and then to car2 object.

2. Function borrowing which means the bind() allows an object to borrow a method from another object without making a copy of that method.

#this-keyword #binding #javascript #front-end-development #call-apply-bind

Binding Concept in Javascript
Eve  Klocko

Eve Klocko

1597844580

WPF Binding examples

I have found very nice WPF XAML Data Binding Cheat Sheet, so I’ll just leave it here for further use.

#xaml #c# #wpf #binding #14

WPF Binding examples
Eve  Klocko

Eve Klocko

1597808254

[WPF] ContextMenu Commnad binding issue fixed

If there is no focused element in the window’s main focus scope, the CanExecute routing will stop at the ContextMenu, so it will not reach to the CommandBinding on the Window, one workaround is to bind MenuItem’s CommandTarget to the main window.

#c# #wpf #binding

[WPF] ContextMenu Commnad binding issue fixed
Sadie  Ratke

Sadie Ratke

1597779360

[WPF] Binding ItemsSource to Enum

Suppose you need to bind ItemsSource dependency property to enum’s values. For example in ComboBox.

You have following enum:

public enum ExampleEnum
{
     Red,
     Green,
     Yellow
}

Now you can use ObjectDataProvider

<Window x:Class="ExampleApplication.Window"
 xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
 xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
 xmlns:System="clr-namespace:System;assembly=mscorlib"
 xmlns:local="clr-namespace:ExampleApplication"
 Title="Bind to Enum" Height="250" Width="250">
  <Window.Resources>
     <ObjectDataProvider x:Key="enumValues"
       MethodName="GetValues" ObjectType="{x:Type System:Enum}">
          <ObjectDataProvider.MethodParameters>
               <x:Type TypeName="local:ExampleEnum"/>
          </ObjectDataProvider.MethodParameters>
     </ObjectDataProvider>
  </Window.Resources>
</Window>

and now in ItemsSource propety use following binding syntax:

<ComboBox ItemsSource="{Binding Source={StaticResource enumValues}}" />

#c# #wpf #binding #enum #csharp #programming-c

[WPF] Binding ItemsSource to Enum

Angular Two Way Binding

Event and property binding are one-way binding. Two-way binding is where the data flows in both directions between the component’s template and model. Given that event binding uses () syntax and property binding uses [] syntax it makes sense 2 way binding uses [()] syntax!

Angular 2 binding

The ngModel directive allows us to do 2 way data binding. In the following example the criteria component property is bound to the search input’s value in both directions …

import { Component } from "angular2/core";
import { NgClass } from "angular2/common";

@Component({
  selector: "namesearch",
  template: `
    <input
      type="search"
      placeholder="enter criteria"
      [(ngModel)]="criteria"
    /><button (click)="doSearch()">Search</button>
  `,
  directives: [NgClass]
})
export class NameSearchComponent {
  public criteria: string;
  constructor() {
    // set criteria to the users last criteria
    // use a setTimeout() in this simple example
    setTimeout(() => {
      this.criteria = "fred";
    }, 1000);
  }
  doSearch() {
    console.log(this.criteria);
  }
}

#angular #binding #ngmodel #component

Angular Two Way Binding